William dunn



W. DUNN.

Saw Set (No Model.)

No. 241,633. Patented May17,l88h

UNITED STATES PATENT OFFICE.

WILLIAM DUNN,;OF BUFFALO, NEW YORK, ASSIGNOR TO EDWARD J. HALL,

OF SAME PLACE.

SAW-SET.

SPECIFICATION forming part of Letters Patent No. 241,633, dated May 17,1881.

Application filed February 3, 1881.

To all whom it may concern Be it known that 1, WILLIAM DUNN, of the cityof Buffalo, in the county of Erie and State of New York, have inventednew and useful Improvements in Saw-Sets, of which the followingisaspecification, reference being had to the accompanying drawings.

This invention relates more particularly to a machine for setting theteeth of circular saws;

and it consists of the construction, combination, and arrangement of theparts which compose the machine, as will be hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a side elevation of myimproved machine. Fig. 2 is a longitudinal vertical section of the same.Fig. 3 is a top-plan View of the machine. Fig. 4 is a perspective viewof the hammer. Fig. 5 is a perspective View of the anvil. Fig. 6 is across-section in line at a, Fig. 1.

Like letters of reference refer to like parts in the several figures.

A represents the bed of the machine, provided at one end with anupwardly-projectin g lug,B, having a vertical slot, b, in which isarranged the fulcrum-bearingG. The latter rests on a spring, 0, whichpresses the bearing 0 upward, and the bearing is held down by asetscrew, d, so that by tightening or releasing the set-screw thebearing can be raised or lowered in the slot 1).

E represents the lever to which the hammer F is attached. This leverispivoted to thebearing 0 by a horizontal bolt, 0, and is provided with anose, 0, which limits the upward move mentof the lever by strikingagainst ashoulder, 6 on the bed. The hammerF is provided with two faces,ff, arranged on opposite sides and made of different widths. The hammeris secured in a socket, f, on the under side of the lever E, by a bolt,g, so that the hammer can be reversed in the socket and either face berought over the anvil G. The hammer F can 5 removed from the lever E andbe replaced y a hammer having faces of greater or less I idth, inaccordance with the size of the saw- The anvil (N0 model.)

in which the anvil is held. The anvilis made square, and provided on itsupper side with four faces, h h it lb of different bevels, either ofwhich may be brought under the hammer by releasing the screw g andturning the anvil.

I represents a rib arranged on the bed A,in the rear of the anvil G, andforming a supporting-surface for the saw.

K represents an arm, which bears upon the saw and prevents the latterfrom rising when the hammer depresses a tooth. The arm Kis provided witha vertical pivot, which turns in a socket, k, formed on the bed A, andis held in place by a set-screw, k.

l is a longitudinal slot formed in the bed A, and M is the saw-carrier,made adjustable in the slot l toward and from the anvil. The carrier Mconsists of a plate resting on the bed A, and provided with an upwardly-projectin g hub, m, adapted to pass through the eye of the saw.The carrier M is secured to the bed byavertical bolt, m, passing throughthe hub of the carrier, and provided with a screw-nut on its upper side.Upon releasing the nut the carrier M can be moved toward and from theanvil and adjusted to correspond with the diameter of the saw operatedupon. The hub m'is composed of a body formed in one piece with thesaw-carrier M and an adjustable piece, at, provided with a slottedhorizontal base, m which is adjustably secured to the 'carrier M by ascrew-bolt, on. By adjusting the adjustable piece at toward or from thebody of the hub the size ofthehubis decreased or increased to adapt itto the varying sizes of the eyes of the saws.

The circular saw to be set is placed upon the carrier M, and the latteris adjusted on the bed so as to bring the teeth of the saw over theforward beveled face, h, of the anvil. The teeth of the saw are set bybringing the hammer down on the teeth with greater or less force, as maybe required, the saw beiu g turned by hand during this operation on thestud or huh m of the carrier M. By raising and lowering thepivot-bearing G of the lever E the inclination of the lower face of thehammer Fis adjusted to correspond with the particular bevel of the anvil which is required to be used in setting the saw and to correspondwith the thickness of the saw operated upon.

I claim as my invention-- 1. The combination, with the bed A, providedwith an adjustable anvil having two or more faces of different bevel, ofthe hammer F, attached to a lever, E, having its pivot made verticallyadjustable, whereby theface of the ham mer is adjusted to correspondwith the bevel of the anvil, substantially as set forth.

2. The combination, with thebedA,pr 0vided with lug B, having a verticalslot, 1), of the'bearing 0, resting on the spring 0 and held down by aset-screw, d, and the lever E, pivoted to the bearing 0, substantiallyas set forth.

3. The combination, with the bed A, of the anvil G andsupporting-surface l, arranged in WM. DUNN.

Witnesses J NO. J. BONNER, EDW. J. BRADY.

